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The figure below is a model of a watch tower with a square base of side 10 cm. Height PU is 15 cm and slanting edges UV = TV = SV = RV = 13 cm.
Giving the answer correct to two decimal places,
calculate:
(a) length MP
(b) the angle between MU and plane MNPQ
(c) Length of VO
(d) The angle between planes VST and RSTU